Welcome to HVAC-Talk.com, a non-DIY site and the ultimate Source for HVAC Information & Knowledge Sharing for the industry professional! Here you can join over 150,000 HVAC Professionals & enthusiasts from around the world discussing all things related to HVAC/R. You are currently viewing as a NON-REGISTERED guest which gives you limited access to view discussions

To gain full access to our forums you must register; for a free account. As a registered Guest you will be able to:

Participate in over 40 different forums and search/browse from nearly 3 million posts.

How do the Novar pulses work with a IMP-1010

This is an older Novar controller. I've seen some newer ones that I think pulse something like .6 sec to 2.5 sec. I believe this one is on a 1 minute cycle on for 13 off for 47 etc. My question is about testing the IMP-1010 transducer. There is a momentary switch that will inflate/deflate the actuator but how can I test it with a relay or jumper wire? I tried constant on, constant off, manual pulsing, nothing works. Tried a few and they are all the same. I ordered a UCP-822 to replace one I am sure is dead but am unsure of how to set it up and test as well.

As I said I have no software. I need some way of making this work. Someone mentioned a relay but didn't say how to wire it. The current 'triac' terminals go right to the IPM. Should I rewire and run 24 volts through those contacts to a relay? I am a little leery of powering outputs.

Thanks Wolfie. Ok here is what I did. I knew this module is looking for pulse contact closure. I ohmed the IOM output but there was no continuity when the light was cycling. There was no a/c volts, dc volts, milliamps, nothing. Then I reexamined one that was working and found that it has it's own power supply going to the input contacts and my 'broken' one didn't. I took the advice here and put 24 volts through the IOM DO to power a relay which goes to the transducer. Good as new! Thanks.

Thanks Wolfie. Ok here is what I did. I knew this module is looking for pulse contact closure. I ohmed the IOM output but there was no continuity when the light was cycling. There was no a/c volts, dc volts, milliamps, nothing. Then I reexamined one that was working and found that it has it's own power supply going to the input contacts and my 'broken' one didn't. I took the advice here and put 24 volts through the IOM DO to power a relay which goes to the new UCP 822 transducer. Good as new! Thanks.